40202109 has 8 divisors (see below), whose sum is σ = 59558720. Its totient is φ = 26801388.

The previous prime is 40202087. The next prime is 40202153. The reversal of 40202109 is 90120204.

It is not a de Polignac number, because 40202109 - 2⁷ = 40201981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40202091 and 40202100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40202159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 744457 + ... + 744510.

It is an arithmetic number, because the mean of its divisors is an integer number (7444840).

Almost surely, 2^40202109 is an apocalyptic number.

It is an amenable number.

40202109 is a deficient number, since it is larger than the sum of its proper divisors (19356611).

40202109 is a wasteful number, since it uses less digits than its factorization.

40202109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488976 (or 1488970 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 40202109 is about 6340.5133072962. The cubic root of 40202109 is about 342.5702244696.

The spelling of 40202109 in words is "forty million, two hundred two thousand, one hundred nine".